%% The LaTeX package genealogytree - version 2.4.1 (2026/06/16)
%% gtrcore.processing.code.tex: Processing
%%
%% -------------------------------------------------------------------------------------------
%% Copyright (c) 2013-2026 by Prof. Dr. Dr. Thomas F. Sturm <thomas dot sturm at unibw dot de>
%% -------------------------------------------------------------------------------------------
%%
%% This work may be distributed and/or modified under the
%% conditions of the LaTeX Project Public License, either version 1.3
%% of this license or (at your option) any later version.
%% The latest version of this license is in
%%   http://www.latex-project.org/lppl.txt
%% and version 1.3 or later is part of all distributions of LaTeX
%% version 2005/12/01 or later.
%%
%% This work has the LPPL maintenance status `author-maintained'.
%%
%% This work consists of all files listed in README
%%
\gtr@set@library@version{2.4.1}
%%%%%%%%%%%%%%%%%%%%%%%
%% Processing - common
%%%%%%%%%%%%%%%%%%%%%%%

% register a macro to localizable for levels
% #1: variable
% #2: key setting
% #3: global save
\def\gtr@proc@register@level@local@core#1#2#3{%
  \appto\gtr@proc@level@save@settings{\let#3#2}%
  \appto\gtr@proc@level@load@settings{\let#2#3}%
  \appto\gtr@proc@level@globalize@settings{\global\let#1#2}%
}

% register a macro to be localizable for levels
% #1: variable
% key setting: gtr@@kv@@#1
% global save: gtr@@save@@#1
\def\gtr@proc@register@level@local#1{%
  \begingroup\edef\x{\endgroup\noexpand\gtr@proc@register@level@local@core{%
    \noexpand#1%
  }{%
    \csname gtr@@kv@@\expandafter\@gobble\string#1\endcsname%
  }{%
    \csname gtr@@save@@\expandafter\@gobble\string#1\endcsname%
  }}\x%
}

\gtr@proc@register@level@local{\gtr@level@distance}
\gtr@proc@register@level@local{\gtr@level@size}
\gtr@proc@register@level@local{\gtr@node@minsize}
\gtr@proc@register@level@local{\gtr@node@maxsize}
\gtr@proc@register@level@local{\gtr@dist@sibling@par}
\gtr@proc@register@level@local{\gtr@dist@sibling@chi}
\gtr@proc@register@level@local{\gtr@dist@parent@par}
\gtr@proc@register@level@local{\gtr@dist@parent@chi}
\gtr@proc@register@level@local{\gtr@dist@further}


\def\gtr@proc@level@opt{%
  \begingroup%
    \gtr@proc@level@load@settings%
    %
    \global\let\gtr@gkv@opt@family@level\@empty%
    \global\let\gtr@gkv@opt@subtree@level\@empty%
    \global\let\gtr@gkv@opt@node@level\@empty%
    %
    \gtrset{%
      family/.code={\gtrkeysgappto\gtr@gkv@opt@family@level{##1}},
      subtree/.code={\gtrkeysgappto\gtr@gkv@opt@subtree@level{##1}},
      node/.code={\gtrkeysgappto\gtr@gkv@opt@node@level{##1}},
    }%
    %
    \global\gtr@ignorefalse%
    \gtrset{level=\number\gtr@c@level,level \number\gtr@c@level/.try}%
    \ifgtr@ignore%
      \global\def\gtr@gkv@opt@ignore@level{ignore}%
    \else%
      \global\let\gtr@gkv@opt@ignore@level\@empty%
    \fi%
    %
    \gtr@proc@level@globalize@settings%
    %
  \endgroup%
  %
  \gtr@init@leveldimens%
}


\long\def\gtr@proc@subtree@opt#1{%
  \global\gtr@ignorefalse%
  \begingroup%
    \gtrset{id=,pivot shift=0pt,
      family/.code={\gtrkeysgappto\gtr@gkv@opt@family{##1}\gtrset{##1}},
      subtree/.code={\gtrkeysgappto\gtr@gkv@opt@subtree{##1}},
      node/.code={\gtrkeysgappto\gtr@gkv@opt@family{##1}},% sic!
    }%
    \global\let\gtr@gkv@opt@family\gtr@gkv@opt@family@level%
    \global\let\gtr@gkv@opt@subtree\gtr@gkv@opt@subtree@level%
    \gtrset{#1,code={\pgfkeysalsofrom{\gtr@gkv@opt@ignore@level}\gtr@key@keysalsofrom{/gtr/sopt/\gtr@gkv@id}}}%
  \endgroup%
  \csedef{gtr@fam@\gtr@currentfamily @id}{\gtr@gkv@id}%
  \csedef{gtr@fam@\gtr@currentfamily @ps}{\gtr@gkv@pivotshift}%
  %
  \gtr@cs@storekey{gtr@fam@\gtr@currentfamily @opt@family}{\gtr@gkv@opt@family}%
  %
  \ifcsdef{gtr@fam@\gtr@currentfamily @fam}{%
    \letcs\gtr@encfamily{gtr@fam@\gtr@currentfamily @fam}%
    \letcs\gtr@temp{gtr@fam@\gtr@encfamily @opt@subtree}%
    \gtr@cs@storekeys{gtr@fam@\gtr@currentfamily @opt@subtree}{\gtr@temp}{\gtr@gkv@opt@subtree}%
  }{%
    \gtr@cs@storekey{gtr@fam@\gtr@currentfamily @opt@subtree}{\gtr@gkv@opt@subtree}%
  }%
}


\def\gtr@proc@@set@enc@family{%
  \ifnum\gtr@famstack@size>0\relax%
    \gtr@famstack@peekto{\gtr@encfamily}%
    \csedef{gtr@fam@\gtr@currentfamily @fam}{\gtr@encfamily}%
  \fi%
  \csdef{gtr@fam@\gtr@currentfamily @offset}{0pt}%
}

\long\def\gtr@proc@@family@begin#1{%
  \gtr@proc@@set@enc@family%
  \gtr@proc@subtree@opt{#1}%
}

\def\gtr@proc@@parent@begin{%
  \csdef{gtr@fam@\gtr@currentfamily @type}{par}%
  \gtr@proc@@family@begin%
}

\def\gtr@proc@@child@begin{%
  \csdef{gtr@fam@\gtr@currentfamily @type}{chi}%
  \gtr@proc@@family@begin%
}

\def\gtr@proc@@union@begin{%
  \csdef{gtr@fam@\gtr@currentfamily @type}{uni}%
  \gtr@proc@@family@begin%
}

\def\gtr@proc@@sandclock@begin{%
  \csdef{gtr@fam@\gtr@currentfamily @type}{san}%
  \gtr@proc@@family@begin%
}

\def\gtr@proc@pivot@reset{%
  \let\gtr@current@pivot@chi=\@undefined%
  \let\gtr@current@pivot@par=\@undefined%
}


\def\gtr@proc@pivot@check@child#1#2{%
  \ifcsname gtr@per@#1@pivo@chi\endcsname%
    \let\gtr@current@pivot@chi=#2%
  \fi%
}


\def\gtr@proc@pivot@check@parent#1#2{%
  \ifcsname gtr@per@#1@pivo@par\endcsname%
    \let\gtr@current@pivot@par=#2%
  \fi%
}


\def\gtr@proc@compute@pivotpoint@chi{%
  \ifdefined\gtr@current@pivot@chi%
    \let\gtr@tmp@chipos@mid=\gtr@current@pivot@chi%
  \else%
    \dimdef\gtr@tmp@chipos@mid{(\gtr@tmp@chipos@A+\gtr@tmp@chipos@B)/2}%
  \fi%
}

\def\gtr@proc@compute@pivotpoint@par{%
  \ifdefined\gtr@current@pivot@par%
    \let\gtr@tmp@parpos@mid=\gtr@current@pivot@par%
  \else%
    \dimdef\gtr@tmp@parpos@mid{(\gtr@tmp@parpos@A+\gtr@tmp@parpos@B)/2}%
  \fi%
}


%%%%%%%%%%%%%%%%%%%%%%%
%% Processing - parent
%%%%%%%%%%%%%%%%%%%%%%%

\def\gtr@procpar@following@parent#1{%
  \ifcsname gtr@per@#1@chiof\endcsname
    \letcs\gtr@parent@fam{gtr@per@#1@chiof}%
    \gtr@cont@merge@tree{\gtr@parent@fam}{\gtr@dist@parent@par}%
  \else
    \gtr@cont@merge@node{#1}{\gtr@dist@parent@par}%
  \fi%
  \let\gtr@tmp@parpos@B=\gtr@tmp@linkpos%
  \gtr@proc@pivot@check@parent{#1}{\gtr@tmp@linkpos}%
}


\def\gtr@procpar@first@parent#1{%
  \let\do=\gtr@procpar@following@parent%
  \ifcsname gtr@per@#1@chiof\endcsname
    \letcs\gtr@parent@fam{gtr@per@#1@chiof}%
    \gtr@cont@first@tree{\gtr@parent@fam}%
  \else
    \gtr@cont@first@node{#1}%
  \fi%
  \let\gtr@tmp@parpos@A=\gtr@tmp@linkpos%
  \let\gtr@tmp@parpos@B=\gtr@tmp@linkpos%
  \gtr@proc@pivot@check@parent{#1}{\gtr@tmp@linkpos}%
}


\def\gtr@procpar@following@child#1{%
  \gtr@cont@merge@anchor{#1}{\gtr@dist@sibling@par}%
  \let\gtr@tmp@chipos@B=\gtr@tmp@linkpos%
  \gtr@proc@pivot@check@child{#1}{\gtr@tmp@linkpos}%
}


\def\gtr@procpar@first@child#1{%
  \let\do=\gtr@procpar@following@child%
  \gtr@cont@first@anchor{#1}%
  \let\gtr@tmp@chipos@A=\gtr@tmp@linkpos%
  \let\gtr@tmp@chipos@B=\gtr@tmp@linkpos%
  \gtr@proc@pivot@check@child{#1}{\gtr@tmp@linkpos}%
}


\def\gtr@proc@@parent@end{%
  \ifcsname gtr@fam@\gtr@currentfamily @g\endcsname%
  \else\gtr@error{No g-node in parent family (\gtr@currentfamily)}{Every family needs a g-node}%
  \fi%
  \gtr@proc@pivot@reset%
  \csdef{gtr@fam@\gtr@currentfamily @frac}{0.5}%
  \gtr@set@position@family{\gtr@currentfamily}%
  \let\gtr@tmp@nextwest=\@undefined%
  \let\gtr@tmp@nexteast=\@undefined%
  %
  \csdef{gtr@fam@\gtr@currentfamily @offset}{0pt}%
  \letcs\gtr@currentchildlist{gtr@fam@\gtr@currentfamily @chi}%
  \letcs\gtr@currentparentlist{gtr@fam@\gtr@currentfamily @par}%
  %
  \ifdefined\gtr@currentparentlist%
    \let\do=\gtr@procpar@first@parent%
    \dolistloop{\gtr@currentparentlist}%
    \gtr@proc@compute@pivotpoint@par%
  \fi%
  \let\do=\gtr@procpar@first@child%
  \dolistloop{\gtr@currentchildlist}%
  \gtr@proc@compute@pivotpoint@chi%
  \ifdefined\gtr@currentparentlist%
    \dimdef\gtr@temp{\gtr@tmp@parpos@mid-\gtr@tmp@chipos@mid+\csuse{gtr@fam@\gtr@currentfamily @ps}}%
    \gtr@cont@shift{\gtr@currentchildlist}{\gtr@temp}%
  \fi%
}


%%%%%%%%%%%%%%%%%%%%%%%
%% Processing - child
%%%%%%%%%%%%%%%%%%%%%%%

\def\gtr@procchi@following@parent#1{%
  \gtr@cont@merge@anchor{#1}{\gtr@dist@parent@chi}%
  \let\gtr@tmp@parpos@B=\gtr@tmp@linkpos%
  \gtr@proc@pivot@check@parent{#1}{\gtr@tmp@linkpos}%
}


\def\gtr@procchi@first@parent#1{%
  \let\do=\gtr@procchi@following@parent%
  \gtr@cont@first@anchor{#1}%
  \let\gtr@tmp@parpos@A=\gtr@tmp@linkpos%
  \let\gtr@tmp@parpos@B=\gtr@tmp@linkpos%
  \gtr@proc@pivot@check@parent{#1}{\gtr@tmp@linkpos}%
}


\def\gtr@procchi@following@child#1{%
  \ifcsname gtr@per@#1@parof\endcsname
    \letcs\gtr@child@fam{gtr@per@#1@parof}%
    \gtr@cont@merge@tree{\gtr@child@fam}{\gtr@dist@sibling@chi}%
  \else
    \gtr@cont@merge@node{#1}{\gtr@dist@sibling@chi}%
  \fi%
  \let\gtr@tmp@chipos@B=\gtr@tmp@linkpos%
  \gtr@proc@pivot@check@child{#1}{\gtr@tmp@linkpos}%
}


\def\gtr@procchi@first@child#1{%
  \let\do=\gtr@procchi@following@child%
  \ifcsname gtr@per@#1@parof\endcsname
    \letcs\gtr@child@fam{gtr@per@#1@parof}%
    \gtr@cont@first@tree{\gtr@child@fam}%
  \else
    \gtr@cont@first@node{#1}%
  \fi%
  \let\gtr@tmp@chipos@A=\gtr@tmp@linkpos%
  \let\gtr@tmp@chipos@B=\gtr@tmp@linkpos%
  \gtr@proc@pivot@check@child{#1}{\gtr@tmp@linkpos}%
}

\def\gtr@proc@@child@end{%
  \ifcsname gtr@fam@\gtr@currentfamily @g\endcsname%
  \else\gtr@error{No g-node in child family (\gtr@currentfamily)}{Every family needs a g-node}%
  \fi%
  \gtr@proc@pivot@reset%
  \letcs\gtr@gnode{gtr@fam@\gtr@currentfamily @g}%
  \csdef{gtr@fam@\gtr@currentfamily @offset}{0pt}%
  \ifcsname gtr@fam@\gtr@currentfamily @union\endcsname%
    \numdef\gtr@@parts{2}%
    \def\do##1{\numdef\gtr@@parts{\gtr@@parts+1}}%
    \dolistcsloop{gtr@fam@\gtr@currentfamily @union}%
    \dimdef\gtr@@dimfrac{1pt/\gtr@@parts}%
    \pgfmathqparse{\gtr@@dimfrac}%
    \csedef{gtr@fam@\gtr@currentfamily @frac}{\pgfmathresult}%
    \gtr@set@position@family{\gtr@currentfamily}%
    \let\gtr@@dimsumfrac=\gtr@@dimfrac%
    %
    \def\dodo##1{%
      \dimdef\gtr@@dimsumfrac{\gtr@@dimsumfrac+\gtr@@dimfrac}%
      \pgfmathqparse{\gtr@@dimsumfrac}%
      \csedef{gtr@fam@##1@frac}{\pgfmathresult}%
      \gtr@set@position@family{##1}%
      \ifcsname gtr@fam@##1@g\endcsname%
      \else%
        \listcseadd{gtr@fam@##1@par}{\gtr@gnode}%
        \gtr@add@gnode{\gtr@gnode}{##1}%
      \fi%
      \let\do=\dodo% loop-in-loop
    }%
    \let\do=\dodo%
    \dolistcsloop{gtr@fam@\gtr@currentfamily @union}%
  \else%
    \csdef{gtr@fam@\gtr@currentfamily @frac}{0.5}%
    \gtr@set@position@family{\gtr@currentfamily}%
  \fi%
  \let\gtr@tmp@nextwest=\@undefined%
  \let\gtr@tmp@nexteast=\@undefined%
  %
  \letcs\gtr@currentchildlist{gtr@fam@\gtr@currentfamily @patchi}%
  \letcs\gtr@currentparentlist{gtr@fam@\gtr@currentfamily @patpar}%
  %
  \ifdefined\gtr@currentchildlist%
    \let\do=\gtr@procchi@first@child%
    \dolistloop{\gtr@currentchildlist}%
    \gtr@proc@compute@pivotpoint@chi%
  \fi%
  \let\do=\gtr@procchi@first@parent%
  \dolistloop{\gtr@currentparentlist}%
  \gtr@proc@compute@pivotpoint@par%
  \ifdefined\gtr@currentchildlist%
    \dimdef\gtr@temp{\gtr@tmp@chipos@mid-\gtr@tmp@parpos@mid-\csuse{gtr@fam@\gtr@currentfamily @ps}}%
    \gtr@cont@shift{\gtr@currentparentlist}{\gtr@temp}%
  \fi%
}


%%%%%%%%%%%%%%%%%%%%%%%
%% Processing - union
%%%%%%%%%%%%%%%%%%%%%%%

% merge list #1 to #2
\def\gtr@procuni@mergechild@list#1#2{%
  \ifcsname#1\endcsname%
    \def\do##1{%
      \ifcsname gtr@per@##1@parof\endcsname%
      \else%
        \gtr@add@family{##1}{\gtr@encfamily}%
      \fi%
      \listcseadd{#2}{##1}%
    }%
    \dolistcsloop{#1}%
  \fi%
}

% merge list #1 to #2
\def\gtr@procuni@mergeparent@list#1#2{%
  \ifcsname#1\endcsname%
    \def\do##1{%
      \gtr@add@family{##1}{\gtr@encfamily}%
      \listcseadd{#2}{##1}%
    }%
    \dolistcsloop{#1}%
  \fi%
}

\def\gtr@proc@@union@end{%
  \gtr@famstack@peekto{\gtr@encfamily}%
  \gtr@add@union{\gtr@currentfamily}{\gtr@encfamily}%
  \gtr@procuni@mergechild@list{gtr@fam@\gtr@currentfamily @chi}{gtr@fam@\gtr@encfamily @patchi}%
  \gtr@procuni@mergeparent@list{gtr@fam@\gtr@currentfamily @par}{gtr@fam@\gtr@encfamily @patpar}%
  \ifcsname gtr@fam@\gtr@encfamily @g\endcsname
    \letcs\gtr@gnode{gtr@fam@\gtr@encfamily @g}%
    \listcseadd{gtr@fam@\gtr@currentfamily @par}{\gtr@gnode}%
    \gtr@add@gnode{\gtr@gnode}{\gtr@currentfamily}%
  \fi%
}


%%%%%%%%%%%%%%%%%%%%%%%
%% Processing - sandclock
%%%%%%%%%%%%%%%%%%%%%%%

\def\gtr@proc@@sandclock@end{%
  \gtr@proc@pivot@reset%
  \csdef{gtr@fam@\gtr@currentfamily @frac}{0.5}%
  \gtr@set@position@family{\gtr@currentfamily}%
  \let\gtr@tmp@nextwest=\@undefined%
  \let\gtr@tmp@nexteast=\@undefined%
  %
  \csdef{gtr@fam@\gtr@currentfamily @offset}{0pt}%
  \letcs\gtr@currentchildlist{gtr@fam@\gtr@currentfamily @chi}%
  \letcs\gtr@currentparentlist{gtr@fam@\gtr@currentfamily @par}%
  %
  \ifdefined\gtr@currentparentlist%
    \let\do=\gtr@procpar@first@parent%
    \dolistloop{\gtr@currentparentlist}%
    \gtr@proc@compute@pivotpoint@par%
    \csedef{gtr@fam@\gtr@currentfamily @ceast@panchor}{\gtr@tmp@nexteast}%
    \csedef{gtr@fam@\gtr@currentfamily @cwest@panchor}{\gtr@tmp@nextwest}%
  \fi%
  %
  \let\gtr@tmp@nextwest=\@undefined%
  \let\gtr@tmp@nexteast=\@undefined%
  \ifdefined\gtr@currentchildlist%
    \let\do=\gtr@procchi@first@child%
    \dolistloop{\gtr@currentchildlist}%
    \gtr@proc@compute@pivotpoint@chi%
    \dimdef\gtr@temp{\gtr@tmp@chipos@mid-\gtr@tmp@parpos@mid-\csuse{gtr@fam@\gtr@currentfamily @ps}}%
    \ifdefined\gtr@currentparentlist%
      \gtr@cont@shift@sandclock{\gtr@currentparentlist}{\gtr@temp}%
    \fi%
    \csedef{gtr@fam@\gtr@currentfamily @ceast@canchor}{\gtr@tmp@nexteast}%
    \csedef{gtr@fam@\gtr@currentfamily @cwest@canchor}{\gtr@tmp@nextwest}%
  \fi%
}


%%%%%%%%%%%%%%%%%%%%%%%
%% Processing - g/p/c
%%%%%%%%%%%%%%%%%%%%%%%

\long\def\gtr@proc@@parent@g@content{%
  \gtr@add@child{\gtr@currentperson}{\gtr@currentfamily}%
  \gtr@add@gnode{\gtr@currentperson}{\gtr@currentfamily}%
  \gtr@add@family{\gtr@currentperson}{\gtr@currentfamily}%
  \ifnum\gtr@famstack@size>0\relax%
    \gtr@famstack@peekto{\gtr@childfamily}%
    \gtr@add@parent{\gtr@currentperson}{\gtr@childfamily}%
  \fi%
}

\long\def\gtr@proc@@child@g@content{%
  \gtr@add@parent{\gtr@currentperson}{\gtr@currentfamily}%
  \gtr@add@gnode{\gtr@currentperson}{\gtr@currentfamily}%
  \gtr@add@family{\gtr@currentperson}{\gtr@currentfamily}%
  \ifnum\gtr@famstack@size>0\relax%
    \gtr@famstack@peekto{\gtr@parentfamily}%
    \gtr@add@child{\gtr@currentperson}{\gtr@parentfamily}%
  \fi%
}

\long\def\gtr@proc@@p@content{%
  \gtr@add@parent{\gtr@currentperson}{\gtr@currentfamily}%
  \gtr@add@family{\gtr@currentperson}{\gtr@currentfamily}%
}

\long\def\gtr@proc@@c@content{%
  \gtr@add@child{\gtr@currentperson}{\gtr@currentfamily}%
  \gtr@add@family{\gtr@currentperson}{\gtr@currentfamily}%
}

\gtrset{
  linked@family@options/.is choice,
  linked@family@options/p/.code={},
  linked@family@options/c/.code={},
  linked@family@options/pc/.code={},
  linked@family@options/gc/.code={},
  c@mpl@m@nt@d/.code={\gdef\gtr@flag@node@c{true}},
}

\def\gtr@linked@family@options@p{}
\def\gtr@linked@family@options@c{}
\def\gtr@linked@family@options@g{%
  \ifnum\gtr@famstack@size>0\relax%
    \gtr@famstack@peekto{\gtr@linkedfamily}%
    \gtr@cs@keysalsofrom{gtr@fam@\gtr@linkedfamily @opt@family}%
  \fi%
}

\long\def\gtr@proc@add@node#1#2{%
  \ifcsdef{gtr@per@\gtr@currentperson @box}%
    {\letcs\gtr@pbox{gtr@per@\gtr@currentperson @box}}%
    {\newbox\gtr@pbox\csxdef{gtr@per@\gtr@currentperson @box}{\the\gtr@pbox}}%
  %
  \setbox\gtr@pbox\hbox{%
    \begingroup%
    \begin{pgfinterruptpicture}%
      \global\gtr@ignorefalse%
      \gdef\gtr@flag@node@c{false}%
      \gdef\gtr@flag@node@r{unrelated}%
      \gdef\gtr@flag@node@s{neuter}%
      \gtrset{id=,distance=-1sp,pivot=none,tikz=,
        code={%
          \gtr@cs@keysalsofrom{gtr@fam@\gtr@currentfamily @opt@subtree}%
          \csuse{gtr@linked@family@options@\gtrnodetype}%
          \gtr@cs@keysalsofrom{gtr@fam@\gtr@currentfamily @opt@family}%
          \pgfkeysalsofrom{\gtr@gkv@opt@node@level}},%
        #1,
        code={\gtr@key@keysalsofrom{/gtr/nopt/\gtr@gkv@id}}%
      }%
      \unless\ifgtr@ignore%
        \gtr@box@content@interpreter{#2}%
        \gtr@box@content@processor%
      \fi%
    \end{pgfinterruptpicture}%
    \endgroup%
  }%
  \unless\ifgtr@ignore%
    \csedef{gtr@per@\gtr@currentperson @id}{\gtr@gkv@id}%
    \csedef{gtr@per@\gtr@currentperson @flag@c}{\gtr@flag@node@c}%
    \csedef{gtr@per@\gtr@currentperson @flag@r}{\gtr@flag@node@r}%
    \csedef{gtr@per@\gtr@currentperson @flag@s}{\gtr@flag@node@s}%
    \ifdim\gtr@gkv@distance>-1sp\relax%
      \csedef{gtr@per@\gtr@currentperson @distance}{\gtr@gkv@distance}%
    \fi%
    \ifcase\number\gtr@gkv@pivot\relax%
    \or\csedef{gtr@per@\gtr@currentperson @pivo@chi}{}%
    \or\csedef{gtr@per@\gtr@currentperson @pivo@par}{}%
    \else\csedef{gtr@per@\gtr@currentperson @pivo@chi}{}%
         \csedef{gtr@per@\gtr@currentperson @pivo@par}{}%
    \fi%
    \ifx\gtr@gkv@tikz\@empty\else%
      \csedef{gtr@per@\gtr@currentperson @tikz}{\gtr@gkv@tikz}%
    \fi%
    %
    \gtr@set@level@position{\gtr@currentperson}%
  \fi%
}

\def\gtr@add@parent#1#2{%
  \listcseadd{gtr@fam@#2@par}{#1}%
  \listcseadd{gtr@fam@#2@patpar}{#1}%
  \csedef{gtr@per@#1@parof}{#2}%
}

\def\gtr@add@child#1#2{%
  \listcseadd{gtr@fam@#2@chi}{#1}%
  \listcseadd{gtr@fam@#2@patchi}{#1}%
  \csedef{gtr@per@#1@chiof}{#2}%
}

\def\gtr@add@gnode#1#2{%
  \csedef{gtr@fam@#2@g}{#1}%
}

\def\gtr@add@family#1#2{%
  \csedef{gtr@per@#1@fam}{#2}%
}

\def\gtr@add@union#1#2{%
  \listcseadd{gtr@fam@#2@union}{#1}%
}

% loop through a single tree

\def\gtr@forall@nodes#1{%
  \numdef\gtr@num@per@count{\gtr@num@per@first}%
  \loop%
  \ifnum\gtr@num@per@count<\numexpr\gtr@num@per@last+1\relax%
    \gtr@set@currentperson{\gtr@num@per@count}%
    #1{\gtr@currentperson}%
    \numdef\gtr@num@per@count{\gtr@num@per@count+1}%
  \repeat%
}

\def\gtr@forall@families#1{%
  \numdef\gtr@num@fam@count{\gtr@num@fam@first}%
  \loop%
  \ifnum\gtr@num@fam@count<\numexpr\gtr@num@fam@last+1\relax%
    \gtr@set@currentfamily{\gtr@num@fam@count}%
    #1{\gtr@currentfamily}%
    \numdef\gtr@num@fam@count{\gtr@num@fam@count+1}%
  \repeat%
}

% linear search for all trees

\def\gtr@getPerNumForId@loop#1{%
  \ifnum#1<\numexpr\gtr@num@per@last+1\relax%
    \gtr@set@currentperson{#1}%
    \letcs\gtr@currentid{gtr@per@\gtr@currentperson @id}%
    \ifx\gtr@tmp@id\gtr@currentid\relax%
      \let\gtr@tmp@num\gtr@currentperson%
    \else%
      \expandafter\gtr@getPerNumForId@loop\expandafter{\number\numexpr#1+1\expandafter}%
    \fi%
  \fi%
}

\def\gtr@getPerNumForId#1{%
  \edef\gtr@tmp@id{#1}%
  \edef\gtr@tmp@num{}%
  \gtr@getPerNumForId@loop{1}%
}

\def\gtr@getFamNumForId@loop#1{%
  \ifnum#1<\numexpr\gtr@num@fam@last+1\relax%
    \gtr@set@currentfamily{#1}%
    \letcs\gtr@currentid{gtr@fam@\gtr@currentfamily @id}%
    \ifx\gtr@tmp@id\gtr@currentid\relax%
      \let\gtr@tmp@num\gtr@currentfamily%
    \else%
      \expandafter\gtr@getFamNumForId@loop\expandafter{\number\numexpr#1+1\expandafter}%
    \fi%
  \fi%
}

\def\gtr@getFamNumForId#1{%
  \edef\gtr@tmp@id{#1}%
  \edef\gtr@tmp@num{}%
  \gtr@getFamNumForId@loop{1}%
}

% #1: child (id)
% #2: family (id)
\def\gtr@add@child@after@parser#1#2{%
  \gtr@getPerNumForId{#1}%
  \let\gtr@tmp@pnum\gtr@tmp@num% person number for ID
  %
  \gtr@getFamNumForId{#2}%
  \let\gtr@tmp@fnum\gtr@tmp@num% family number for ID
  %
  \listcseadd{gtr@fam@\gtr@tmp@fnum @chi}{\gtr@tmp@pnum}%
}

% #1: parent (id)
% #2: family (id)
\def\gtr@add@parent@after@parser#1#2{%
  \gtr@getPerNumForId{#1}%
  \let\gtr@tmp@pnum\gtr@tmp@num% person number for ID
  %
  \gtr@getFamNumForId{#2}%
  \let\gtr@tmp@fnum\gtr@tmp@num% family number for ID
  %
  \listcseadd{gtr@fam@\gtr@tmp@fnum @par}{\gtr@tmp@pnum}%
}


\def\gtr@disconnect@child#1#2{%
  \letcs\gtr@temp@list{gtr@fam@#2@chi}%
  \ifdefvoid{\gtr@temp@list}{}{%
    \csundef{gtr@fam@#2@chi}%
    \def\do##1{%
      \ifdefstring{#1}{##1}{}{\listcseadd{gtr@fam@#2@chi}{##1}}%
    }%
    \dolistloop{\gtr@temp@list}%
  }%
}

\def\gtr@disconnect@node@as@child#1{%
  \def\gtr@tmp@pnum{#1}%
  \letcs\gtr@tmp@fnum{gtr@per@#1@chiof}%
  \ifdefvoid{\gtr@tmp@fnum}{}{%
    \gtr@disconnect@child{\gtr@tmp@pnum}{\gtr@tmp@fnum}%
  }%
}

\def\gtr@remove@child@after@parser#1#2{%
  \gtr@getPerNumForId{#1}%
  \ifdefempty{\gtr@tmp@num}{}{%
    \let\gtr@tmp@pnum\gtr@tmp@num% person number for ID
    %
    \gtr@getFamNumForId{#2}%
    \ifdefempty{\gtr@tmp@num}{}{%
      \let\gtr@tmp@fnum\gtr@tmp@num% family number for ID
      %
      \gtr@disconnect@child{\gtr@tmp@pnum}{\gtr@tmp@fnum}%
    }%
  }%
}

\def\gtr@disconnect@parent#1#2{%
  \letcs\gtr@temp@list{gtr@fam@#2@par}%
  \ifdefvoid{\gtr@temp@list}{}{%
    \csundef{gtr@fam@#2@par}%
    \def\do##1{%
      \ifdefstring{#1}{##1}{}{\listcseadd{gtr@fam@#2@par}{##1}}%
    }%
    \dolistloop{\gtr@temp@list}%
  }%
}


\def\gtr@disconnect@node@as@parent#1{%
  \def\gtr@tmp@pnum{#1}%
  \letcs\gtr@tmp@fnum{gtr@per@#1@parof}%
  \ifdefvoid{\gtr@tmp@fnum}{}{%
    \gtr@disconnect@parent{\gtr@tmp@pnum}{\gtr@tmp@fnum}%
  }%
}


\def\gtr@remove@parent@after@parser#1#2{%
  \gtr@getPerNumForId{#1}%
  \ifdefempty{\gtr@tmp@num}{}{%
    \let\gtr@tmp@pnum\gtr@tmp@num% person number for ID
    %
    \gtr@getFamNumForId{#2}%
    \ifdefempty{\gtr@tmp@num}{}{%
      \let\gtr@tmp@fnum\gtr@tmp@num% family number for ID
      %
      \gtr@disconnect@parent{\gtr@tmp@pnum}{\gtr@tmp@fnum}%
    }%
  }%
}
